The different methods of producing plane polarised light are
(A) Reflection
(B) Scattering
(C) Double Refraction
(D) Selective absorption
Choose the correct answer from the options given below:

The block diagram of a transmitter will have in sequence.
(A) Power amplifier
(B) Amplitude modulator
(C) Message signal
(D) Square law device
(E) Transmitting antenna
Choose the correct answer from the options given below :

A particle is dropped from height H. The de-Broglie wavelength of the particle as a function of height is proportional to:

Equipotential surfaces at a great distance from a collection of charges whose total sum is not zero are approximately:

In an electrical circuit, the three resistors of 3 \( \Omega \), 6 \( \Omega \) and 9 \( \Omega \) are connected in series. The voltage drop across 3 \( \Omega \) is 5 V. The voltage drop across the combination is

A plane wave is incident on a concave mirror of radius R. The shape of the reflected wavefront will be

When the surface of a metal is illuminated with the light of wavelength 400 nm, the KE of the ejected photoelectrons is 1.68 eV. Then the work function of the metal is (hc = 1240 eV-nm) :

If the lines \(\frac{x-5}{5 \lambda+2}=\frac{2-y}{5}=\frac{1-z}{-1}\) and \(x=\frac{y+1 / 2}{2 \lambda}=\frac{z-1}{3}\) are perpendicular, then the value of \(\lambda\) is equal to

What is the relation between phase difference \((\Delta \theta)\) and path difference \((\Delta x)\) ?

The linear charge density of an infinite line charge producing a uniform electric field of \(9 \times 10^6 N / C\) at a distance of 2 cm is :
(Take permittivity of vacuum \(\epsilon_0=8.85 \times 10^{-12} C ^2 N^{-1} m^{-2}\) )

If two vectors \(\vec{a}\) and \(\vec{b}\) are such that \(|\vec{a}|=2,|\vec{b}|=3\) and \(\vec{a} \cdot \vec{b}=4\), then \(|\vec{a}-2 \vec{b}|\) is :

Read the passage carefully and answer the questions:
The degeneracy of the \(d\) orbitals has been removed due to ligand electron-metal electron repulsions in the octahedral complex to yield three orbitals of lower energy, \(t_{2 g}\) set and two orbitals of higher energy, \(e_g\) set. This splitting of the degenerate levels due to the presence of ligands in a definite geometry is termed as crystal field splitting and the energy separation is denoted by \(\Delta_0\). Thus energy of the two \(e_g\) orbitals will increase by \((3 / 5) \Delta_0\) and that of three \(t_{2 g}\) will decrease by \((2 / 5) \Delta_0\). The crystal field splitting \(\Delta_{\circ}\) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong fields, in which case the splitting will be large, whereas others produce weak fields and consequently result in small splitting of \(d\) orbitals. Relative magnitude of crystal field splitting energy \(\Delta_{\circ}\) and pairing energy, \(P\) (energy required for electron pairing in a single orbital) determine the formation of low spin ( \(\Delta_{\circ}>P\) ) or high spin ( \(\Delta_{\circ}<P\) ) complex. In tetrahedral coordination entity formation, the \(d\)-orbital splitting is inverted and is smaller as compared to the octahedral field splitting. The crystal field theory attributes the colour of the complex to \(d-d\) transition of the electron. The colour of the coordination compounds depends on the crystal field splitting. In the absence of ligand, crystal field splitting does not occur and hence the substance is colourless.
Which of the following complex is not expected to be coloured?

Identify the most volatile compound